The Maryland Racing Commission will join the Maryland Jockey Club in appealing a judge's decision favorable to Rosecroft Raceway in the debate over cross-breed simulcasting.

At their meeting yesterday at Laurel Park, the commissioners voted to appeal the ruling by Prince George's County Circuit Court Judge James J. Lombardi. Last month, Lombardi overturned a decision by the racing commission denying Rosecroft Raceway, a harness track in Prince George's County, the right to simulcast thoroughbred races without sharing revenues with the state's thoroughbred horsemen, breeders and tracks.

The Maryland Jockey Club of Pimlico and Laurel Park, the state's major thoroughbred tracks, also plans to appeal.

Dennis Dowd, president of Ocean Downs, asked the commission to bar Rosecroft Raceway from racing on the same nights in July and August as Ocean Downs. His request was promptly denied.

Finally, the commission postponed until its next meeting renewing permits for the state's off-track betting facilities. Commissioners said they wanted to review financial records of the facilities after Cap Mona, owner of the Port Tobacco site, said his and other OTBs are losing money.

"It's non-profit organizations we're all running," Mona said.

He complained of a lack of cooperation from officials of the Maryland Jockey Club. Commissioner Ernest J. Colvin urged Marty Jacobs, general counsel of the Maryland Jockey Club, to sit down with the OTB owners "and see if you can't help one another."